SOLUTION: If 2 cards are chosen from a 52 card deck, what is the probability both are black or both are diamonds?

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Question 440900: If 2 cards are chosen from a 52 card deck, what is the probability both are black or both are diamonds?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
If 2 cards are chosen from a 52 card deck, what is the probability both are black or both are diamonds?
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P(B or D) = P(B)+P(D) - P(B and D)
= 26C2/52C2 + 13C2/52C2 - 0C2/52C2
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= [26C2+13C2-0]/52C2
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= 403/1326
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= 0.3039
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Cheers,
Stan H.
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